As with other games in this series, this game presents a somewhat cute concept (all upwards spikes) and some decent base design, then proceeds to ruin it all with overly precise jumps that throw the difficulty balance and pacing all out of wack. It's not fun or interesting to have to do, say, a frame perfect rejump in the middle of a save that is otherwise mostly trivial, it's just annoying and overly grindy for the difficulty that the rest of the game is.